Squeaky rear brake

[Ruby Racing]

Does taking the resevior cap off help in returning the pistons to the in position?

It shouldn't make any difference, however probably best to take the cap off then you wont push the pistons in too far and push too much fluid back into the reservoir and overflow it.


Also check if your disc is warped or not. Get the caliper off and just put a marker very close to the disc and then spin the wheel. Look at the disc end on and see if there is any lateral movement. The gap between your marker and the disc should stay constant.